pre test
matter and it's interaction
![Pre Test Matter And Its Interaction class=](https://ph-static.z-dn.net/files/d1d/b431d49869d11db695d1dcbfc36e8bd2.jpg)
Answer:
15.D
16.C
17.A
18.B
19.C
20.D
21.a
22.B
23.A
24.A
25.B
26.D
27.D
Explanation:
hope helps